Fluid mixing valve



Dec. 11, 1956 J. K. LUND FLUID MIXING VALVE 3 Sheets-Sheet 1 OriginalFiled June 5, 1951 127175171 01 Jmzzes fzfllzzzzd Dec. 11, 1956 J. K.LUND Re. 24,255

FLUID MIXING VALVE Original Filed June 5, 19'51 3 sheets sheet 2 A? 1 2!Figfi F7 .6 r/m' yg %I: T0 E i-- j A 1 27 W 5 f? k M gg] 9 [NVEJYZ 01 agJar/26512.2 and add/P27111 5 Dec. 11, 1956 J, LUND Re. 24,255

FLUID MIXING VALVE Original Filed June .5, 1951 3 Sheets-Sheet 3JHVE'HZ. 47P

United States Patent Ofiice Re. 24,255 Reissued Dec. 11, 1956 FLUIDMIXING VALVE James K. Lund, Oak Park, Ill., assignor to The Dole ValveCompany, Chicago, 111., a corporation of Illinois Original No.2,712,324, dated July 5, 1955, Serial No. 229,983, June 5, 1951.Application for reissue June 1, 1956, Serial No. 588,938

12 Claims. (Cl. 137-606) Matter enclosed in heavy brackets [II appearsin the original patent but forms no part of this reissue specification;matter printed in italics indicates the additions made by reissue.

This invention relates to improvements in fluid mixing valves fordelivering hot or cold water, or for mixing the hot and cold water anddelivering it at intermediate temperatures.

My invention has as one of its principal objects to provide a new andimproved fluid mixing valve arranged with a view toward utmostsimplicity and compactness in structure and operation.

A further object of my invention is to provide a novel form of mixingvalve, constructed and arranged to simplify the manufacture of thevalve, by making the valve body of a one-piece construction and byeliminating the need for inserts, to form the passageways and seats ofthe valve.

Still another object of my invention is to provide a new and improvedmixing valve including an integral open ended valve body having valvemeans closing the ends of the body and controlling the flow of hot andcold liquids into the body through the open ends thereof, with a centralpassageway leading from the body, and spaced inlets on opposite sides ofthe central passageway, one of which communicates with the centralpassageway through one open end of the valve body, and the other ofwhich communicates with the central passageway through the other openend thereof.

A still further object of my invention is to provide a novel form ofmixing valve, for mixing hot and cold water and delivering hot or coldwater, or mixed hot and cold water at an intermediate temperature,wherein the hot and cold inlets of the valve body enter the body fromone side thereof and the outlet from the valve body is from the oppositeside thereof, one inlet communicating with one end of the body and theother inlet communicating with the other end of the body; and whereinfluid pressure operated valve means close opposite ends of the valvebody and with the valve body form chambers for passing the fluid fromthe respective inlets to the central opening through the valve body forcontact and mixture in opposed directions.

These and other objects of my invention will appear from time to time asthe following specification proceeds and with reference to theaccompanying drawings, wherein:

Figure 1 is a view in side elevation of a solenoid operated fluid mixingvalve constructed in accordance with my invention;

Figure 2 is an end view of the valve shown in Figure 1 with the solenoidcoils for controlling operation of the valve removed;

Figure 3 is a fragmentary vertical sectional view taken longitudinallythrough the center of the valve, with the solenoid coils for controllingoperation of the valve removed;

Figure 4 is a horizontal sectional view taken substantially along linesIVIV of Figure 1;

Figure 5 is a top plan view of the valve, with the upper solenoid andpressure operated valve removed;

Figure 6 is a fragmentary vertical sectional view taken substantiallyalong lines VL-VI of Figure 5; v

Figure 7 is a plan view of a modified form of valve body which may beconstructed in accordance with my invention;

Figure 8 is a horizontal sectional view taken through the valve bodyshown in Figure 7;

Figure 9 is a vertical sectional view taken substantially along linesIXIX of Figure 7 and showing a solenoid controlled pressure operatedvalve depending from the lower end of the valve body; and

Figure 10 is a vertical sectional view taken substantially along thelines X-X of Figure 8.

In the embodiment of my invention illustrated in Figures 1 through 6 ofthe drawings, the valve is shown as comprising a valve body 10, whichmay be cast or molded from one of the well known thermoplasticmaterials, and then drilled and machined as required.

The valve body 10 has a hot water inlet 11 entering said valve bodyalong one side thereof and a laterally spaced cold water inlet 12entering said valve body along the opposite side thereof. The laterallyspaced inlets 11 and 12 communicate with the hollow interior of saidvalve body and are separated by the side walls of a mixing chamber 14.The mixing chamber 14 is in the form of a central passageway extendingalong said valve body and opening from the opposite end of said valvebody from said hot and cold water inlets. The valve body 10 is alsoshown as having two vertically spaced faces or walls 15 and 16 openingto the upper and lower ends thereof, and

' connected together by a central passageway 17 extending verticallythrough said valve body and opening to the upper and lower ends thereofand intersecting the mixing chamber 14.

A vertical passageway 23 is herein shown as extending upwardly from theinlet 11 through the annular face or wall 15 and as forming a flowpassageway to the inside of a diaphragm 20, seated at its periphery in arecess 21 at the outer margins of the wall or upper face 15, and havinga central valve 22, to close or open the upper end of the verticalpassageway 17 for the flow of hot water into the mixing chamber 14through the passageway 23 leading through the wall 15 of the valve body.

A passageway 19 is herein shown as leading downwardly from the coldwater inlet 12 and opening through the annular face or wall 16 to theinside of a diaphragm 25, having an inwardly extending central valve26;, to open or close the lower end of the central passageway 17, forthe flow of cold water into the mixing chamber 14 from the cold waterinlet 12. The diaphragm 25 is. seated at its periphery in an annularrecess 27 forming the outer margin of the bottom face 16 of the valvebody.

The diaphragms 20 and 25 and integrally formed valves 22 and 26 thereofare herein shown as being pressure operated diaphragm valves of a wellknown form,

having central apertures extending therethrough closed by valves and 31,respectively, to maintain the valves closed by pressure enteringdiaphragm chambers on the outer sides of said diaphragms through bleederpassageways 32 and 33 in said respective diaphragms. The valves 30 and31, are shown as being formed integrally with the inner ends of plungers34 and 35 respectively slidably guided in guide stems 36 and 37. Theguide stems 36 and 37 are herein shown as being formed integrally withand extending outwardly from caps 38 and 39 respectively. The caps 38and 39 engage the outer surfaces of the respective diaphragms 20 and 25,adjacent their edges and with said diaphragms, form the outer diaphragmchambers of the valves. A spring 40 is shown as yieldably maintainingthe valve 30 in position to block the passage of fluid through thecentral aperture in the diaphragm 20. A similar spring (not shown) isprovided to urge the valve 31 into position to block the flow of fluidthrough the central passageway in the diaphragm 25 to maintain the valve26 closed.

The plungers 34 and 35 form armatures of solenoids 41 and 42, the coilsof which encircle the stems 36 and 37 and are suitably mounted thereon.The caps 38 and 39 are shown as being maintained in fluid tightengagement with the outsides of the respective diaphragms 20 and 25 bymeans of the yokes 43 and 44, engaging the edges of the respective caps38 and 39, and clamped thereto by means of machine screws 45, 45extending through the yoke 43 and, shown as being threaded within theyoke 44.

Upon the energization of either one of the solenoids 41 and 42, therespective valve will open, allowing fluid to pass through the centralpasageway in the respective diaphragm, and reduce the fluid pressure onthe outer sides of the respective diaphragm, thus allowing the pressureon the inner sides of said diaphragm to move the respective valve to anopen position, for the free flow of fluid through the central verticalpassage 18 into the mixing chamber 14.

The mixing chamber 14 terminates into an outlet 47 forming acontinuation of the passageway 14. The outlet 47 is externally threadedand is shown as having a stepped fitting 49 threaded thereon. A washeror gasket 50 abuts the end of said outlet and engages the steppedportion of the fitting 49, to prevent the leakage of fluid past thethreads of said fitting. The outlet 47 has a shouldered portion 51, ofincreased diameter, within which is slidably mounted a flexible flowcontrol washer 53. The flow control washer 53 may be made from rubber oran elastomer, and upon the passage of fluid under pressure through theoutlet 47, is engaged with the inner face of the stepped fitting 49, anddeforms to enlarge or reduce the delivery area of the orificetherethrough, as in Patent No. 2,454,929, which issued to Leslie A.Kempton on November 30, 1948. The flow control washer 53 may be variedto give the desired delivery pressure and volume of fluid delivered fromthe valve, and besides regulating the pressure and volume of the fluiddelivered by the valve also sets up a back pressure in the mixingchamber 14 and on the diaphragm valves 22 and 26 to prevent chatteringthereof.

The inlets 11 and 12 each have a strainer 55 therein. The strainers 55,55 are shown as being of a hat-like form, having backwardly turned rims56, 56 engaging the bores of the respective inlets. The rims 56, 56 abutwashers 57, 57, engaging inner shouldered portions of the passageways 11and 12 and limiting inward movement of the respective strainers. Checkvalves (not shown) may also be provided in said passageways if desired.

A simplified and improved valve and valve body structure has thus beenprovided, wherein the machiningoperations are very much simplified overformer mixing valves, and wherein the .cold water enters the vmixingchamber from the bottom and the hot water enters the thereof, assuring'auniform mixture and delivery of 'a tempered water. It may further beseen that the valve body is of a one piece construction which mayreadily be made from a [thermal-plastic] thermoplastic material, andalso requires a minimum amount of space, making it suitable forcontrolling the supply of hot, cold or tempered water in predeterminedcycles for automatic washing machines.

In the form of my invention shown in Figures 7, S, 9 and l0, 1 haveshown a mixing valve constructed on principles similar to the valveshown in Figures 1 through 6, but more particularly adapted to beconstructed from brass, bronze, or any other suitable metal, andpreferably from an extruded bronze oar, extruded into the general valvebody shape desired, and then drilled and machined as required[ In thisform of my invention, a valve body 70 is shown as having a hot waterinlet 71 and a cold water inlet 72 leading into the valve body onopposite sides of a mixing chamber 73 extending therealong and openingfrom the opposite side of said valve body from said inlets. A verticalpassage 74, which may be drilled through the valve body from the upperto the lower ends thereof, intersects the mixing chamber 73 at rightangles with respect thereto and opens to opposite ends of said valvebody.

The valve body 70 is provided with opposite end walls or faces 75 and76, the inner margins of which define the central passage 74 and formseats for pressure operated solenoid controlled diaphragm valves 77, 77.One only of said diaphragm valves is herein shown and said valves may belike those shown in the form of my invention illustrated in Figures 1through 6, so a detailed description thereof need not herein berepeated.

The hot water inlet passage 71 communicates with its associateddiaphragm valve 77 through a plurality of drilled passageways 79, 79drilled from the face or wall 76 and intersecting said inlet passge. Thecold water inlet passage 72 communicates with the opposite diaphragmvalve through drilled passageways 80, 80 drilled from the opposite faceor wall 75 of the valve body. When the respective pressure operatedvalve 77 is open, water will pass from the inlet passageway 71, throughthe drilled pasageways 79 into the central passageway 74 to the mixingchamber 73 from the bottom thereof, and out through a discharge outlet81 thereof. In a like manner cold water will enter the cold waterpassageway or inlet 72 and pass through the passageway 80, 80 downwardlyinto the central passageway 74 and enter the mixing chamber 73 in an"opposing direction from the hot water, for uniform mixture with the hotwater.

Check valves 83, 83 may be provided in the passageways 71 and 72 toprevent the back flow of water from the mixing chamber'73 when therespective valves 77, 77 are open. The check valves'83, 83 are eachherein shown as being of "a wafer type of check valve including aflexiblewafer 84 made from rubber or an elastomer and mounted in a cage85. Said cages are seated in the respective inlet passageways 71 and 72and are shown as being of an inverted cylindrical form having anarctuate bottom extending within the wall of said cage. Each wafer 84 isherein shown as abutting the inwardly extending convex face of the cage85, and as being held in engagement therewith by back pressure of theliquid. The wafer 84 is retained to its cage by nibs 86, 86 extendingthrough apertured portions of said cages. The cages 85, 85 are alsoapertured, to permit the passage of water therethrough, by flexing thewafer 84 in a direction away from the convex face of its respectivecage. Strainers like the strainers 55, 55 may be provided in the inlets71 and 72, to strain the incoming water if desired. r

The outlet passage 81 may have a suitablefitting (not shown) threadedtherein, having a flow control washer (not shown) like the flow controlwasher 53, mounted therein to control the volume and pressure of thewater delivered by the valve, as in the form of my invention shown inFigure 1.

It may be seen that in this form of my invention the valve body mayreadily be formed from a casting or an extruded metal shape and that allof the passageways therein may be formed by simple drilling operationswith a minimum amount of machining.

It will be understood that modifications and variations may be effectedwithout departing from the scope of the novel concepts of the presentinvention.

I claim as my invention:

1. A valve body comprising a hollow body part having two aligned spacedrecessed outwardly facing annular wall portions, a central passagewaythrough said wall portions opening to opposite sides of said valve body,the hollow part of said valve body defining a mixing chamber extendingtherealong parallel to said wall portions and intersecting said centralpassageway, an outlet from said valve body from one end of said mixingchamber, two spaced inlets leading into said valve body into theopposite end thereof from said outlet and extending along said body onopposite sides of said mixing chamber and parallel thereto, andseparated therefrom by the walls of said passageway, and fluidpassageways extending generally parallel to said central passageway forthe flow of fluid from said inlets into said mixing chamber in opposeddirections, including a fluid passageway from one of said inlets throughone of said wall portions and another fluid passageway from the other ofsaid inlets through the other of said Wall portions.

2. In a mixing valve, a valve body having axially aligned annularrecessed portions facing opposite ends thereof and having a passagewayextending through said valve body from one recessed portion to theother, and connecting said annular recessed portions together, a centralchamber extending along said valve body perpendicularly to andintersecting said passageway and defining a mixing chamber openingdirectly from said valve body through a wall thereof perpendicular tothe walls of said recessed portions, two spaced inlets into said valvebody and extending therealong on opposite sides of said mixing chamberand separated therefrom by the walls thereof, a flow passageway leadingfrom one of said inlets to one of said annular recessed portions, asecond flow passageway leading from the other of said inlets in anopposite direction from said first flow passageway to the otherrecess-ed portion of said valve body, and pressure operated valve meansin said annular recessed portion of said valve body operated by thepressure of fluid in said flow passageways and enclosing the ends ofsaid flow passageways and controlling the flow of fluid from said inletpassageways into said mixing chamber.

3. Ina mixing valve comprising a valve body having a central passagewayleading therethrough and opening to opposite sides thereof, said valvebody having two spaced recessed portions having annular walls encirclingsaid central passageway and defining the outer margins thereof andfacing opposite ends of said valve body, flexible diaphragms sealed tosaid walls and forming pressure operated valves, operable to close theends of said central passage, solenoid operated means operable tocontrol operation of said valves, a mixing chamber within said valvebody between said valves and extending perpendicular to and intersectingsaid central passageway, an outlet from said mixing chamber and valvebody in the space between said valves, two spaced inlets leading intosaid valve body along opposite sides of said mixing chamber, a flowpassageway from one of said inlets leading perpendicularly therefrom andcommunicating with the inside of an associated diaphragm for operatingthe same to open the associated valve, a flow passageway from the otherof said inlets through the other of said spaced walls and leading fromsaid inlet in an opposite, direction from said first flow passageway andcommunicating with the inside of the other of said diaphragms foroperating the same to open the associated valve, and said diaphragmsconfining the flow of water from said flow passageways to said centralpassageway for mixture in said mixing chamber in opposing directionswhen the two valves associated therewith are open.

4. A mixing valve comprising a central valve body having a pair of inletpassageways and an outlet passageway extending therefrom, thelongitudinal axes of all three passageways lying parallel to each other,said central body having three communicating ducts lying substantiallyat right angles to said passageways, one of said ducts intersecting saidoutlet passageway and leading entirely through said valve body andopening to opposite ends thereof, another of said ducts leading in onedirection from one of said inlet passageways to one open end o-fsaidvalve body, the third of said ducts leading in an opposite directionfrom the other inlet passageway to the other open end of said valvebody, and valve means for closing the open ends of said first duct andconfining the flow of fluid from said second and third ducts to said oneduct when the valves are opened.

5. A mixing valve comprising a valve body having a pair of inletpassageways and an outlet passageway extending therefrom, thelongitudinal axes of all three passageways lying substantially in asingle plane, said valve body having valve means on opposite sides ofthe plane of said passageways and forming closure means for oppo sitesides of said valve body, said valve body also having duct meansconnecting one of said inlet passageways with one of said valve meansand duct means connecting the other of said inlet passageways with theother of said valve means, additional duct means intersecting saidoutlet passageway connecting each of said valve means with said outletpassageway, and all of said duct means having longitudinal axes lying inplanes generally perpendicular to said passageways.

6. A valve body comprising a hollow molded body part formed of a plasticand having two spaced recessed outwardly facing annular wall portions, acentral passageway through said wall portions opening to opposite sidesof said valve body, the hollow part of said plastic valve body defininga mixing chamber extending therealong parallel to said wall portions andintersecting said central passageway, an outlet from said plastic valvebody from one end of said mixing chamber, two spaced inlets leading intosaid plastic valve body into the opposite end thereof from said outletand extending along said body on opposite sides of said mixing chamberand parallel thereto, and separated therefrom by the walls of saidpassageway, and fluid passageways formed of molded holes and extendinggenerally parallel to said central passageway for the flow of fluid fromsaid inlets into said mixing chamber in opposed directions, including afluid passageway from one of said inlets through one of said wallportions and another fluid passageway from the other of said inletsthrough the other of said wall portions, said spaced inlets narrowing insmooth flowing curves to intersect said fluid passageways. I

7. In a mixing valve, a molded valve body formed of a plastic and havingannular recessed portions facing opposite ends thereof and having apassageway extending through said plastic valve body from one recessedportion to the other, and connecting said annular recessed portionstogether, a central chamber extending along said plastic valve bodyperpendicularly to and intersecting said passageway and defining amixing chamber opening directly from said valve body through a wallthereof perpendicular to the walls of said recessed portions, two spacedinlets leading into said plastic valve body and extending therealong onopposite sides of said mixing chamber and separated therefrom by thewalls thereof, a single oblong flow passageway leading from one of saidinlets to one of said annular recessed portions, a

second single oblong flow passageway leading fromthe other of saidinlets inan opposite direction from said first flow passageway to theother recessed portion of said plastic valve body, and pressure operatedvalve means in said annular recessed portion of said plastic valve bodyoperated by the pressure of fluid in said flow passageways and enclosingthe ends of said flow passageways and controlling the flow of fluid fromsaid inlet passageways into said mixing chamber. I

8. A valve body comprising a hollow molded body part formed of a plasticand having two spaced recessed outwardly facing annular wall portions, acentral passageway through said wall portions opening to opposite sidesof said valve body, the hollow part of said plastic valve body defininga mixing chamber extending therealong parallel to said wall portions andintersecting said central passageway, an outlet from said plastic valvebody from one end of said mixing chamber, two spaced inlets leading intosaid plastic valve body into the opposite end thereof from said outletand extending along said body on opposite sides of said mixing chamberand parallel thereto, and separated therefrom by the walls of saidpassageway, fluid passageways extending generally parallel to saidcentral passageway for the flow of fluid from said inlets into saidmixing chamber in opposed directions, including a fluid passageway fromone of said inlets through one of said wall portions and another fluidpassageway from the other of said inlets through the other of said wallportions, said spaced inlets narrowing in smooth flowing curves tointersect said fluid passageways, and a strainer positioned across eachof said fluid passageways with their edges in engagement with the innersurface of the plastic interior of the passageways.

9. In a mixing valve, a molded valve body formed of a plastic and havingsubstantially aligned annular recessed portions facing opposite endsthereof and having a passageway extending through said plastic valvebody from one recessed portion to the other, and connecting said annularrecessed portions together, a central chamber extending along saidplastic valve body perpendicularly to and intersecting said passagewayand defining a mixing chamber opening directly from said valve bodythrough a wall thereof perpendicular to the walls of said recessedportions, two spaced inlets leading into said plastic valve body andextending therealong on opposite sides of said mixing chamber andseparated therefrom by the Walls thereof, a single flow passagewayleading from one of said inlets to one of said annular recessedportions, a second single flow passageway leading from the other of saidinlets in an opposite direction from said first flow passageway to theother recessed portion of said plastic valve body, pressure operatedvalve means in said annular recessed portion of said plastic valve bodyoperated by the pressure of fluid in said flow passageways and enclosingthe ends of said flow passageways and controlling the flow of fluid fromsaid inlet passageways into said mixing chamber, shouldered portions ineach of said inlets, and a strainer positioned in each of said inletsagainst said shouldered portion and facing the entering fluid, saidstrainers being of a hatlike form with backwardly turned edges engagingthe plastic interior surfaces of the inlets.

10. In a mixing valve, a molded valve body formed of a plastic andhaving annular recessed portions facing opposite ends thereof and havinga passageway extending through said plastic valve body from one recessedportion to the other, and connecting said annular recessed portionstogether, a central chamber extending along said plastic valve bodyperpendicularly -to and intersecting said passageway and defining amixing chamber opening directly from said valve body through a wallthereof perpendicular to the walls of said recessed portions, two spacedinlets leading into said plastic valve body and extending therealong-onopposite sides of said mixing' chamber and separated therefrom by thewalls thereof,

a single oblong flow passageway leading from one of said inlets to ,oneof said annular recessed portions, a second single oblong flowpassageway leading from the other of said inlets in an oppositedirection from said first flow passageway to the other recessed portionof said plastic valve body, an annular groove cut in each end of theplastic valve body coaxial with and surrounding each of said annularrecessed portions, pressure operated valve members formed of a flexibleand resilient material and positioned over said annular recessedportion, said valve members operated by the pressure of the fluid insaid flow passageways and enclosing the ends of said flow passagewaysand controlling the flow of fluid from said inlet passageways into saidmixing chamber, said valve members having annular projecting integralflanges adapted to be pressed into said annular groove in the plasticvalve body, holding members adapted to be clamped over said flanges ofthe valve members to press the flange of the valve member into theannular groove in fluid sealing relationship, and means to clamp saidholding members against the valve members.

11. In a mixing valve, a molded valve body formed of a plastic andhaving annular recessed portions facing opposite ends thereof and havinga passageway extending through said plastic valve body from one recessedportionto the other, and connecting said annular recessed portionstogether, a central chamber extending along said plastic valve bodyperpendicularly to and intersecting said passageway and defining amixing chamber opening directly from said valve body through a wallthereof perpendicular to the walls of said recessed portions, plasticwalled inlet conduits providing fluid inlets and projecting laterallyfrom opposite sides of the valve body and extending parallel to eachother to form a Y with the body of the valve forming the base of the Yand the in let conduits forming the arms, external plastic threadsformed in the ends of the conduits whereby fluid lines may be attachedto the inlet conduits, the inlets leading into said valve body onopposite sides of said mixing chamber and separated therefrom by thewalls thereof, a single oblong flow pasageway leading from one of saidinlets to one of said annular recessed portions, a second single flowpasageway leading from the other of said inlets in an opposite directionfrom said first flow passageand pressure operated valve means in saidannular recessed portion of said plastic valve body operated by thepressure of fluid in said flow passageways and enclosing the ends ofsaid flow passageways and controlling the flow of fluid from said inletpassageways into said mixing chamber.

12. A valve body comprising a hollow molded body part formed of aplastic and having two spaced recessed outwardly facing annular wallportions, a central passageway through said wall portions opening toopposite sides of said valve body, the hollow part of said plastic valvebody defining a mixing chamber extending therealong parallel to saidwall portions and intersecting said central passageway, an outlet fromsaid plastic valve body from one end of said mixing chamber, two spacedinlets leading into said plastic valve body into the opposite endthereof from said outlet and extending along said body on opposite sidesof said mixing chamber and parallel thereto, and separated therefrom bythe walls of said passageway, fluid passageways extending generalyparallel to said central passageway for the flow of fluid from saidinlets into said mixing chamber in opposed directions, including a fluidpasageway from one of said inlets through one of said wall portions andanother fluid passageway from the other of said inlets through the otherof said wall portions, said spaced inlets narrowing in smooth flowingcurves to intersect said fluid passageways, a plastic shoulder withinsaid outlet from the plastic valve body spaced from the end of theoutlet opening and integral with the plastic valve body, a flow controlmeans positioned within said outlet against said shoulder whereby thedischarge flow from the valve is maintained relatively constant withfluid pressure fluctuations within the valve body, and a tubularfluid-conducting fitting for conducting fluid from said valve bodyoutlet, said fitting being of a smaller diameter than said outlet andprovided with a flanged edge to extend laterally across the outletopening and prevent said flow control means from being forced from theoutlet with the flow of fluid through the plastic valve body, and saidfitting removably connected to the valve body outlet whereby the flowcontrol means is held within the outlet opening and the fluid isconducted through said fitting.

References Cited in the file of this patent or the original patentUNITED STATES PATENTS 1,984,999 Stoddard Dec. 18, 1934 2,262,290 KuhnleNov. 11, 1941 2,335,245 Gustafson Nov. 30,, 1943 2,444,631 Chace July 6,1948 2,542,279 Kempton Feb. 20, 1951

